The NMP uses a magnetic quadrupole lens system to focus ion beams from the accelerator.
Two distinguishing features of the new lens system are the design of each quadrupole lens
element and the unique quintuplet, a distributed 5 lens configuration [1-4].
The quadrupole yokes are shaped with pole-tip extensions, and yoke cut-outs between poles for
symmetric detector ports at 135°. The result is large detector solid-angle, normal viewing microscope
and a reduced effective lens working
distance of 80 mm despite a large yoke outer diameter of 270 mm.
new quadrupole quintuplet lens systems are being manufactured by, and are available through,
 C.G. Ryan, D.N. Jamieson, W.L. Griffin, G. Cripps and R. Szymanski, "The New
CSIRO-GEMOC Nuclear Microprobe: First Results, Performance and Recent Applications",
Nucl. Instr. Meth. B181 (2001) 12-19.
 C.G. Ryan and D.N. Jamieson, "A high performance quadrupole quintuplet lens system for the
CSIRO-GEMOC Nuclear Microprobe", Nucl. Instr. Meth. B158 (1999) 18-23.
 C.G. Ryan, D.N. Jamieson, W.L. Griffin and G. Cripps, "The CSIRO-GEMOC Nuclear Microprobe:
A high-performance system based on a new closely integrated design", Nucl. Instr. Meth. B158 (1999) 97-106.
 C.G. Ryan, D.N. Jamieson, W.L. Griffin, S.H. Sie, G. Cripps and G.F. Suter, "The new CSIRO-GEMOC
Nuclear Microprobe: A new highly integrated design for geoscience applications", proc.
10th Australian Conf. on Nuclear Techniques of Analysis, Canberra, ISSN 1329-8437 (1997) NTA/VSA8.